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High pressure has moved north for the winter, allowing the never ending conveyor belt of cold fronts to hit southern Australia rather than just the Southern Ocean.
A front arrives later on Sunday, another later Monday/early Tuesday, another early Wednesday, and yet another on Thursday. This results in snow falling that just never ends... increasing in activity each time a front passes by.
If you're looking at the maps, you'll see a cold pool break away early in the week at the top of the Bight. This is the energy for a cut off low to form. Just a weak one this time, set to track over SA and western NSW on Monday/Tuesday. This travels a bit too far north to be of much use to the alps, but we have the cold front activity anyway.
The series of fronts are great, but without any significant front, or significant drop in pressure, the totals aren't huge. From Sunday to Thursday we're likely to see 10 to 30 cm.
It rapidly clears on Friday as high pressure has enough of the north, and decides to sit over NSW and out to the Tasman Sea. That positioning brings a break in the weather, and light winds, with most resorts in sunshine - lasting across much of the weekend.
As we head into the following week, things currently have the potential to be very ugly.
The modelling isn't in consensus yet (as you would expect more than a week out), but we're seeing the potential for tropical moisture feeds and big instability - but as usual with these big systems - will there be enough cold air?
Most models have a huge feed of cold air - but will it arrive in time over the alps? We'll see as it gets closer.
